coincidental

adjective

co·​in·​ci·​den·​tal (ˌ)kō-ˌin(t)-sə-ˈden-tᵊl 

1

: resulting from a coincidence

a coincidental resemblance

2

: occurring or existing at the same time

coincidental deaths

Synonyms of coincidental

• coincident
• concurrent
• synchronous
• synchronic

Examples of coincidental in a Sentence

The fact that he and his boss went to the same college was purely coincidental.

the nearly coincidental deaths of Princess Diana and Mother Teresa

Recent Examples on the Web

The parallels are coincidental. —ABC News, 9 Apr. 2026

Meanwhile, with the country living in terror under Homelander’s reign, Kripke previously noted that the real-world political parallels in Season 5 are coincidental, as the concluding episodes were written before the 2024 election. —Glenn Garner, Deadline, 8 Apr. 2026

In my outsider opinion, none of this is coincidental. —William Mersey, New York Daily News, 8 Apr. 2026

And while the timing may be purely coincidental, the fact that Forza Horizon 6 is launching as the first major release since Xbox’s leadership upheaval puts it in a position to represent this new era for the brand. —Andrew Webster, The Verge, 8 Apr. 2026

Word History

Etymology

coincident + -al entry 1

First Known Use

circa 1800, in the meaning defined at sense 1

Rhymes for coincidental

• developmental
• environmental
• experimental
• intersegmental
• nongovernmental
• transcontinental
• unsentimental
• accidental
• compartmental
• continental
• detrimental
• elemental

Kids Definition

coincidental

adjective

co·​in·​ci·​den·​tal (ˌ)kō-ˌin(t)-sə-ˈdent-ᵊl 

1

: resulting from a coincidence

a coincidental resemblance

2

: occurring or existing at the same time

coincidentally

-ˈdent-lē, 

-ᵊl-ē

adverb